Map bug fixes (#4595)

Fixes #4578
Fixes #4546
Fixes #4521

html/changelogs/Printer16-Map.yml

@@ -0,0 +1,39 @@
+################################
+# Example Changelog File
+#
+# Note: This file, and files beginning with ".", and files that don't end in ".yml" will not be read. If you change this file, you will look really dumb.
+#
+# Your changelog will be merged with a master changelog. (New stuff added only, and only on the date entry for the day it was merged.)
+# When it is, any changes listed below will disappear.
+#
+# Valid Prefixes: 
+#   bugfix
+#   wip (For works in progress)
+#   tweak
+#   soundadd
+#   sounddel
+#   rscadd (general adding of nice things)
+#   rscdel (general deleting of nice things)
+#   imageadd
+#   imagedel
+#   maptweak
+#   spellcheck (typo fixes)
+#   experiment
+#   balance
+#################################
+
+# Your name.  
+author: Printer16
+
+# Optional: Remove this file after generating master changelog.  Useful for PR changelogs that won't get used again.
+delete-after: True
+
+# Any changes you've made.  See valid prefix list above.
+# INDENT WITH TWO SPACES.  NOT TABS.  SPACES.
+# SCREW THIS UP AND IT WON'T WORK.
+# Also, all entries are changed into a single [] after a master changelog generation. Just remove the brackets when you add new entries.
+# Please surround your changes in  double quotes ("), as certain characters otherwise screws up compiling. The quotes will not show up in the changelog.
+changes: 
+  - bugfix: "The science firing range now has some firing pins."
+  - bugfix: "The security training room no longer starts vented."
+  - bugfix: "Removed an extra disposal chute from the medical chem lab."

maps/aurora/aurora-3_sublevel.dmm

@@ -18777,6 +18777,7 @@
 	},
 /obj/structure/table/reinforced,
 /obj/item/weapon/folder/purple,
+/obj/item/weapon/storage/box/testpins,
 /turf/simulated/floor/tiled/white,
 /area/rnd/test_range)
 "Hi" = (

maps/aurora/aurora-4_mainlevel.dmm

@@ -38707,7 +38707,6 @@
 /turf/simulated/wall/r_wall,
 /area/medical/chemistry)
 "bof" = (
-/obj/machinery/disposal,
 /obj/effect/floor_decal/corner/mauve{
 	icon_state = "corner_white";
 	dir = 9

maps/aurora/aurora-5_interstitial.dmm

@@ -5352,7 +5352,7 @@
 	dir = 8
 	},
 /turf/simulated/floor/tiled,
-/area/mine/unexplored)
+/area/security/training)
 "jC" = (
 /obj/machinery/door/firedoor,
 /obj/machinery/atmospherics/pipe/simple/hidden/scrubbers{
@@ -39583,7 +39583,7 @@ dR
 dR
 el
 db
-jA
+ex
 jB
 eV
 fg